class Jets::Cfn::Builders::ApiDeploymentBuilder

def add_base_path_mapping


but that does not work because the domain name has to match the route53 record exactly.
Note, also tried to change the domain name of to something like demo-dev-[random].mydomain.com

We resolve this by using a custom resource that does an in-place update.

the base path mapping depends on the API Deploy for the stage name.
resource it also creates a new root base path mapping and fails. Additionally,
Because Jets generates a new timestamped logical id for the API Deployment 
def add_base_path_mapping
  return unless Jets.custom_domain?
  function = Jets::Resource::ApiGateway::BasePath::Function.new
  add_resource(function)
  add_outputs(function.outputs)
  mapping = Jets::Resource::ApiGateway::BasePath::Mapping.new
  add_resource(mapping)
  add_outputs(mapping.outputs)
  iam_role = Jets::Resource::ApiGateway::BasePath::Role.new
  add_resource(iam_role)
  add_outputs(iam_role.outputs)
end

def compose

compose is an interface method 
def compose
  return unless @options[:templates] || @options[:stack_type] != :minimal
  deployment = Jets::Resource::ApiGateway::Deployment.new
  add_resource(deployment)
  add_parameters(deployment.parameters)
  add_outputs(deployment.outputs)
  add_base_path_mapping
end

def initialize(options={}) 

def initialize(options={})
  @options = options
  @template = ActiveSupport::HashWithIndifferentAccess.new(Resources: {})
end

def template_path

template_path is an interface method 
def template_path
  Jets::Naming.api_deployment_template_path
end

def write

do not bother writing a template if routes are empty 
def write
  super unless Jets::Router.routes.empty?
end